When building without the vDSO support on PowerPC (which is not a good
idea), the build is failing because few files are not included in the
build.

This fix moves those files inclusion outside of the vDSO directive.

CC: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Acked-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>